noun. A temporary encampment often in an unsheltered area.

intransitive verb. To camp in a bivouac.

noun. An encampment of soldiers in the open air without tents, each soldier remaining dressed and with his weapons by him; hence, figuratively, a position or situation of readiness for emergencies, or a situation demanding extreme watchfulness.

To encamp in the open air without tents or covering, as soldiers on a march or in expectation of an engagement.

noun. The watch of a whole army by night, when in danger of surprise or attack.

noun. An encampment for the night without tents or covering.

intransitive verb. To watch at night or be on guard, as a whole army.

intransitive verb. To encamp for the night without tents or covering.

noun. An encampment for the night, usually without tents or covering.

noun. Any temporary encampment.

noun. The watch of a whole army by night, when in danger of surprise or attack.

verb. To set up camp.

verb. To watch at night or be on guard, as a whole army.

verb. To encamp for the night without tents or covering.

noun. a site where people on holiday can pitch a tent

noun. temporary living quarters specially built by the army for soldiers

verb. live in or as if in a tent

"We marched the next day to the foot of the Guadarama Pass, where our soldiers, when dismissed in bivouac, had a fine hunt after a wild boar, which they killed."